Emsal Vana
Products / Accessories · 900–999 / Limit switch box
PRODUCT GROUP 900 · ACCESSORIES

Limit switch box

A limit switch box detects the open or closed position of a valve, converts it into an electrical signal and passes it to the control system. It is usually fitted to actuated valves and used in process automation for position confirmation, remote monitoring and safety.

LIMIT SWITCH BOXTYPE 900 · EMSAL VANA
DN
—
PN
—
MATERIAL
Aluminium
STANDARD
—
CONNECTION
Threaded
TEST
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Limit switch box

Technical data

01
Connection typeThreaded

The standards listed apply to stocked products. Contact us for other standards.

Material

02
Material
Aluminium

Features

03

Operation

  • The movement of the valve stem actuates mechanical or proximity switches in the box
  • This is converted into an open/closed electrical signal
  • The signal is sent to a PLC, DCS or SCADA system for remote monitoring
  • A visual indicator also allows checks on site

Advantages

  • Remote monitoring and control
  • Process safety – reduces the risk of incorrect valve positions
  • Easy installation and calibration
  • Withstands harsh field conditions
  • Reduces the need for manual intervention

Applications

  • Chemical and petrochemical plants
  • Water treatment and distribution systems
  • Food and pharmaceutical production lines
  • Power plants
  • HVAC systems
  • Marine and ship machinery
  • Fire-fighting and safety systems

Mechanical and proximity switches compared

FeatureMechanical switchProximity (non-contact) switch
Operating principleActuated by physical contactMagnetic, capacitive or optical sensing
DurabilityMore prone to wearLonger life thanks to non-contact design
PrecisionMedium – requires mechanical toleranceHigh – precise position sensing
Ease of installationSimple, common installationMay need electrical setting and calibration
Environmental resistanceCan be affected by dust and moistureIP67/IP68 for harsh environments
PriceUsually more economicalMore expensive, but low maintenance cost
ApplicationsGeneral industrial applicationsExplosive atmospheres, sensitive processes

Downloads

04
DatasheetPDF · TR · dimension and weight table
IN PREPARATION
CAD modelSTEP · DXF · by nominal size
IN PREPARATION
3.1 certificate samplePDF · EN 10204 · TR/EN
Open sample

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05
Limit switch box · 900 · Aluminium